Study of the Effect of Ammonium Phosphate Fertilizer on Acidity and Salinity of Calcareous Soils and Arsenic Bioavailability Using Soils Columns (Case Study of Ghorveh Region)

Soil has always been a factor in contamination of groundwater and the food chain in ecosystems. In soils contaminated with heavy metals, the most important factors in heavy metal bio-availability are pH and Ec. Therefore, studying the effective factors on pH and EC such as chemical fertilizers is important. We used four columns of sampled soil and filled them with calcareous soils of Ghorveh region.Two control columns were filled with twice distilled water and two treatment columns were filled with ammonium phosphate fertilizer dissolved in water, and monitored for six months in laboratory. At the end of leaching period, seven sampels each 10cm apart were taken from each soil column and analyzed. The results showed that the effects of depth and treatments are significant for phosphate, pH and EC. There was also a significant difference between soil pH at the 0 cm depth for control and treatment samples (p